Help!! getting a 1514 on a supercharged vette.

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Feb 1, 2004 | 07:15 PM

Darren

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From: Hammond La,

Help!! getting a 1514 on a supercharged vette.

Ok this is my first supercharge programming attemp so be nice everyone. I just installed a P1SE procharger on an 2003 vette with auto trans. It has linginfelter heads and small cam. Its got a FLP long tubes corsa catback. It also has a 2800 Vig stall. The kit came without the super tuner. Well I have edit for the car so I figured give it a shot before ordering a super tuner.
The Kit cam with 38lb injectors and a 5psi pulley. So I left the timing stock. and added 135% to the injector flow amount. I did not know what to do with the maf so I just raised the maf high fail mhz to 24336. I did have a edwright file for a 98body to kinda look at. I notice there is allot more timing in edwrights program the the stock 03 vette timing. I loaded the file and the car started and ran fine. I took it for a drive and a lite throttle it was fine. as soon as I started to get on it and it turn on a light and reduced engine power message came on. bam a p1514 cam on.
So I went and tried to eliminate the test for the code still no improvement. so I went back and saw there is a Tab for caculated air flow DTC1514. I them looked at edwrights file and see that he has different number in this area. So I compared these numbers to a stock 98 file and see know difference. Then I look up the code and it only seems to be on corvettes. Anyone have a supercharged 2003 a4 vette file they want to seen me or Help me fix this file I would be indedded to you. darrenpb@charter.net

Thanks Darren

Feb 1, 2004 | 10:34 PM

GrannySShifting

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From: Glen Burnie, Md

That is bad. if Im not crossing numbers up in my head, that is the MAF sanity check, if it exceeds values it considers "possible" I beleive it will kick the car into speed desnsity mode, and MAF wont be used for enrichment. Mayeb tray multiplying table by a whole 200%? You defintely dont want to see the car run sans MAF

Feb 1, 2004 | 10:42 PM

Nickn20

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yes multiply the whole table by 200% (1514 calc airflow) over 2k rpm that is what I have had to do in the past...........

Feb 1, 2004 | 11:30 PM

GrannySShifting

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From: Glen Burnie, Md

What power does it usually trip that cde? Ive had cars make 480-540 and never pop it once

Feb 2, 2004 | 09:52 PM

Darren

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From: Hammond La,

Thanks Guys for the responses. I am wondering what I should have changed the injector settings to. any Ideas

Feb 2, 2004 | 11:54 PM

TimZ28

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From: Orlando, FL

GrannySS:

It's not based on peak HP. The PCM (on C5s) is comparing the MAF reading against an airflow table (TP % vs. RPM table). If the MAF readings deviate too far from what the table says they should be the DTC will be set. A Magnason setup is very prone to setting this DTC as the air flow at lower RPMs is much greater than expected.

Tim

Feb 3, 2004 | 08:18 AM

GrannySShifting

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From: Glen Burnie, Md

Oh, I knew it was MAf reading based, but Ive heard of peopel making litle lesspower trip the code. Figuredby now I would have encountered it at least once.

never thought about the fact that the magnusen would trip t easier thanbks!